How to perform Reindexing Programmatically in Magento 2

Indexing is all about how Magento alters data, such as products and categories, to enhance the performance of your store front-end. Once you make any changes to backend or code all your data must be refreshed or updated. Because Magento owns very complex database architecture that contains many database tables to store information like catalog data, prices, users, and stores and to get an instant effect in frontend one must have to reindex all this information in special database tables using indexers. Even making a small change in price or URL requires reindexing of data to get an effect. Instead of manually indexing, using a small piece of code in an extension helps you to perform reindexing programmatically in Magento 2. Here is how to do it.